Improvement in low-water detectors for steam-boilers



ERASTUS S. BENNETT, OF NEW YORK, N. Y., ASSIGNOR TO HIM- SELF AND .IUSTUS SMITH.

Letters .Patent No. 86,125, dated Janna/ry 26, 1869; antedated January 13, 1869.

IMPROVEMENT IN LOW-WATER DETECTORS FOR STEAM-BOILERS.

The Schedule referred to in these Letters Patent and making part of tho Ilmo.

To all whom it may concern? Be it known that 1,'ERAsTUs S. BENNETT, of the city, .county, and State of New York, have invented a new and improved Low-Water Detector for Steam- Boilersz, and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon.

The nature of my invention consists in the construction of the valve and its case, and in the arrangement of the oats, so as -to secure perfectly reliable and at the same time simple and cheap detectors, (or alarms,) which maybe applied to any style of boiler new in useI without removing the Yman-hole plate, and which can be kept well oiled without trouble.

Also in arranging the valve-case, so that the valvepacking may be easily tightened without removing the detector from the boiler.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construc-V tion and operation.

In the drawingl Figure N o. 1 represents a sectional vview of my detector, with the whistle I attached.

' a: x, a cylinder.

A, its cap.

B, piston.

C packing.

Dhpipe, leading to whistle, as shown, (orto the ordiny, signal-whistle above its valve.)

E, a hollow rod, closed at its lower end and at p.

F, opening in pipe.

H, flange, the lower side of which is screwed into the boiler, and into the upper side of which the cylinder is fastened.

This flange furnisles the valve-stem E with a guide at S, and is perforated with two or more holes at G.

J is a float, fastened to the lower end ofthe rod.

K is a iioat, with a tube through its centre, by means of which it may slide on the rod. This float is partially lled, or made 4heavy enough to sinkabout two-thirds in the water.

The steam has access through the holes G and F (and also through the piston bythe holes described by dotted lines) to the upper side of the piston.

The float J is always under water, and keeps the piston crowded up against the stop-pin N.

, vThe heavy sliding float follows the water down, until,

by resting on the lower oat J, it opens the valve, and steam escapes to the whistle.

vFigure No. 2, a bottom view of the ilange.

Figure No. 3, a top or bottom of oat K.

What I claim as my invention, and desire to secure by Letters Patent, is

The arrangement of floats K and J, hollow rod E, and balance-valve C, substantially as described.

E. S. BENNETT. 

